Platen for type-writers or other machines.



No, 766,332. PATENTED AUG. 2, 1904. J. H. DYETT.

PLATEN FOR TYPE WRITERS 0R OTHER MACHINES.

APPLICATION FILED m5121229, 1903.

No MODEL.

v ilqi ATTUHNYS.

Patented August 2, 1904.

UNITED STATES PATENT OFFICE.

JAMES H. DYETT, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERIVOODTYPEYVRITER COMPANY, OF NEIV YORK, N. Y., A CORPORATION OF NEV JERSEY.

PLATEN FOR TYPE-WRITERS OR OTHER MACHINES.

SPECIFICATION forming part of Letters Patent No. 766,332, dated August2, 1904.

Application tiled September 29, 1903. Serial No. 175,014. lNo model.)

To all whom t may concern:

the following' is a specification.

Wy present invention relates to the platens of type-writers and likemachines, and has for its object to provide a light and durable platenso constructed as to minimize the noise generallY produced by the impactot' the type or equivalent member with platens of the customarycharacter.

To this end my invention consists of certain features oitl construction,which I will now proceed to describe as embodied in the typical platenillustrated by the accompanying drawings, it being understood thatvarious modifications may be made without departing from the nature ot'my invention.

In the appended claim I have delined the scope of my invention.

Figure l is partly a longitudinal section ot' the platen and partly anoutside view thereof, and Fig. 2 is a cross-section taken o n line 2 2of Fig. 1.

A indicates the rubber lining, which forms the outer surface of theplaten.

In platens and warp.

To overcome these defects, I

mount the rubber covering A upon an internal apertured or foraminatedsupporting sheet or plate B, which may be made of perforated sheetmetal, as shown.

The central space inclosed by this cylindrical support is interrupted bypartitions or collars O, made of wood or other suitable material. Thusany sound -waves produced within said central space will not be freelypropagated from one end of the platen to the other, but will bereflected by the collars or partitions C, so as to minimize the noise.The fact that the support B is apertured also assists in decreasing thenoise, as the acoustic vibrations ot' said support are much lesspronounced than if said support were imperforate.

The manner of assembling' the parts may 55 be varied. The simplest wayis to wrap the support B around the collars O, then apply the coveringA, and linally tack to it the end covers, as indicated at I). Thecustomary platen-heads E, provided with trunnions E, are also secured tothe end collars Ow-for instance, by means otl screws F.

The improved construction of the platen hereinbet'ore described not onlydeadens the noise, but further presents the advantages of considerablestrength, durability, and lightness.

I claim as my invention and desire to secure by Letters Patent-- Aplaten for type-writers and other machines. said platen being providedwith a longitudinal hollow or chamber and with a soundbreaking partitionwithin said chamber, said partition being provided with a centralaperture to afford communication between the two compartments which itseparates.

In testimony whereotl I have hereunto set my hand in the presence of twosubscribing witnesses.-

JAMES H. DYE'IT. IVitnesses:

JOHN Lo'rKA, EUGENE EBEE.

